AWS Cookbook

Appendix. Fast Fixes

These useful small bits of code will help you save time and get the most out of AWS.

Set your AWS_ACCOUNT_ID to a bash variable:

export AWS_ACCOUNT_ID=$(aws sts get-caller-identity \
--query Account --output text)

Get the most recently created CloudWatch log group name:

aws logs describe-log-groups --output=yaml \
--query 'reverse(sort_by(logGroups,&creationTime))[:1].{Name:logGroupName}'

Tail the logs for the CloudWatch group:

aws logs tail <<LOGGROUPNAME>> --follow --since 10s

Delete all log groups that match a text pattern and prompt yes/no for confirmation:

aws logs describe-log-groups | \
jq ".logGroups[].logGroupName" | grep -i <<pattern>> | \
xargs -p -I % aws logs delete-log-group --log-group-name %

Stop all running instances for your current working Region (H/T: Curtis Rissi):

aws ec2 stop-instances \
--instance-ids $(aws ec2 describe-instances \
--filters "Name=instance-state-name,Values=running" --query "Reservations[].Instances[].[InstanceId]"
--output text | tr '\n' ' ')

Determine the user making CLI calls:

aws sts get-caller-identity --query UserId --output text

Generate YAML input for your CLI command and use it:

aws ec2 create-vpc --generate-cli-skeleton yaml-input > input.yaml
#Edit input.yaml - at a minimum modify CidrBlock, DryRun, ResourceType, and Tags
aws ec2 create-vpc --cli-input-yaml file://input.yaml

List the AWS Region names and endpoints in a table format:

aws ec2 describe-regions --output table

Find interface VPC endpoints ...